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Cards In This Set
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What do the appendicular muscles control?
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The movements of the upper and lower limbs, stabalize and control movements of pectoral and pelvic girdles
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What groups are the pectoral girdle and upper limbs organized into?
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1) muscles that move the pectoral girdle 2) muscles that move the glenohumeral joint/arm 3) arms and forearm muscles that move the elbow joint/forearm 4) forearm muscles that move the wrist joit, fingers 5) intrinsic muscles of the hand
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Where do the muscles of the pectoral girdle originate?
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The axial skeleton
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Where do the muscles of the pectoral girdleinsert on?
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On the scapula and clavicle
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What do the muscles of the pectoral girdledo?
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Both stabalize the scapula and move it to increase the arm's angle of movements
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What do the superficial muscles of the thorax do?
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Elevation, depression, protraction, or retraction
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What are the anterior thoracic muscles?
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Pectoralis minor, serratus anterior, and subclavius
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Pectoralis minor
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Thin flat, triangular muscle deep to the pectoralis major
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What does the pectoralis minor do?
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Helps depress &protract (pull anteriorly) the scapula
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What happens when the pectoralis minor is contracting?
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When your shoulders are hunched forward
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Serratus anterior
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Large flat, fan shaped muscle positioned btwn the ribs and scapula
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What does the serratus anterior do?
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Prime mover (agonist) in scapula protraction. helps stabalize the scapula against the posterior side of the rib cage
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Subclavius
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Small, cylindrical muscle
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What does the subclavius do?
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Extends from the 1st rib to the clavicle main action:stabalize and depress the clavivle
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What are the posterior thoracic muscles?
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The levator scapulae, rhomboid major, rhomboid minor, and trapezius
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